Computing machine



sept. 1s, 1928.

/C/Ty/ sept. 1s, 192s.

H. L. PITMAN COMPUTING MACHINE Filed April 26 1922 3 Sheets-Sheet 2 Sept. 18, 1928. 1,684,515 H. L. PITMAN COMPUTING MACHINE Filed April 26, 1922 5 Sheets-Sheet 3 Patented Sept. 18, 1.928.

UNITED STATES PATENT OFFICE.

HENRY Ii. PITMAN, OF WESTFIELD, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ELLIOTT-FISHER COMPANY, F NEW YORK, N. Y., A CORPORATION OF DELAWARE.

COMPUTING MACHINE.

Application led April 26, 1922. Serial No. 556,661.

This invention relates to computing machines including multiplying machines, and has mainly to do with computing decimals, especially where the machine is used for making out bills.

In multiplying decimals, it frequently happens that the number'of decimal places in the product is successive, and accordingly it is universal practice to disregard the figures appearing below a certain decimal place. For example, in making out bills in United States currency, anything below the cents position is disregarded. In some cases, however, 1t is the practice to add one cent to the product 1/5 where the correct product would be half a cent ormore. In some cases a cent is added where the correct product would be a third of a cent or more.

'Ihe present invention is illustrated in connection with the combined typewriting and multiplying machine of the type illustrated in the United States patent to Von Reppert, No. 1,302,250, dated April 29, 19:19, in which multiplication is effected by the use of product plates. Number-bearing Wheels or dialwhecls are employed to serve in registering the product in a product totalizer.

-In performing some multiplications, the product will show so many decimal places as to make it necessary to provide computing units for all of them. In the illustration of the invention herein disclosed, computing units may be provided for only four decimal places; anything below the fourth decimal place being disregarded in the product and no computation taking place with respect to such low decimals. Of the computing units below the decimal point, the first may be for dimes, thc second for cents, the third for mills and 40 the fourth for tenths of mills.

In order to provide for registering an additional cent, when the mills computing unit has been actuated the required number of steps, sa y, for example, five steps, and thereby secure the result usual in bookkeeping, the mills computing unit is caused to carry over one digit to the cents computing unit when the mills computing unit has been advanced five steps. The carrying operation may be similar to that illustrated in the Von Reppert patent.

In constructing the mills computing unit, there is also taken into consideration the fact that said unit may sometimes be actuated six, seven, eight or nine steps in successive operations, so that it will occasionally happen that said mills computing unit will be rotated from fifteen to eighteen steps in the aggregate during said two operations. Inasmuch as fifteen mills is equal to one and one-half cents, it is obvious that the mere provision for carrying, after the first five steps of rotation of said unit, would produce undesired results from time to time. To solve this problem, said mills computing unit is also provided with means for carrying over an additional digit onto the cents computing unit when said mills computing unit is turned fifteen steps, or, in other words, a carry-over is effected for every tenth step subsequent to the first carryover which is effected after an actuation of five steps from normal. Therefore, said mills computing unit will carry an additional cent when it has been turned five, six, seven, eight, nine, ten, eleven, twelve, thirteen or fourteen steps, and in every such instance it will produce the desired result, and it will carry over an additional cent when it has been advanced to the fifteenth, sixteenth, seventeenth or eighteenth step, thus also securing any result desired in billing machines. In will be understood, however, that while a five and fifteen step movement is illustrated, still the invention is not limited thereto; inasmuch as it is apparent that the repeated carrying-over from the mills to the cents computing unit could occurif desired at step 1 and step 11; or at step 2 and step 12; or at step 3 and step 13; or at 6 and 16; and so on according to the desires of the user of the machines, or according to the custom which may prevail in any locality.

In many instances it would be desirable to disregard entirely the tenths of mills denomination. Provision is made for computing in the tenths of mills place under some circumstances, because in this way the total of the bill may be increased by one or more cents` in some cases, which addition would be lost without provision of mechanism to take care of tenths of mills.

Accordingly the tenths of mills computing unit is caused, whenever it has been advanced five steps, to carry over one digit to the mills computing unit; the carrying operation being similar to that en'iployed on the vother units. This tenths of mills unit, however, is operated differently from the other computing units in the register, in that it is positively connected to its driving element and therefore returns to normal position together with said element after each actuation. Any product that belongs in a lower decimal place than the tenths of mills is disregarded and computation thereof is not performed, there being no computing units therefor.

If desired, the tenths of mills computing unit may. be setl to carry over one digit to the mills computing unit when the former has been advanced one step, two steps, three steps, o r any other number of steps; but it is illustrated herein as having a mill carried over when it has been advancedlive steps. Occasionally'this carrying-over of one digit to the mills computing unit will advance the latter from the fourteenth step to the fifteenth step, and an additional cent will be carried over on the cents computing unit, and as a consequence a cent is added frequently to the amount of the bill by reason of computing in the tenths of mills place. When the tenths of mills computing unit is advanced one step, or two, or three or four steps, nothing is carried over onto the mills place; but each time that said tenths of mills computing unit is advanced to five steps, a mill is carried over; but nothing further is carried even though the tenths of mills computing unit be advanced to six, seven, eight or nine steps. The ultimate result is but little increased by the use of the tenths of mills computing unit,l

inasmuch as on the average it is only about 1/18 of the time that the mills computing unit would stand either at four or fourteen at the time that a mill is carried over onto said unit; but the use of the tenths of mills unit has the effect of obtaining the ultimate number of cents more nearly correct than would be the case if the tenths of mills productwere entirely disregarded as is usually done in mental computation.

According to the invention as herein illustrated,'both the mills computing unit and the tenths of mills computing unit are non-indicating. .In other words, there are no dial- Wheels provided for these computing units.

The operator sees only the cents, dimes and dollars wheels.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a front elevation of a portion of that part of the machine wherein the totalizers are contained.

Figure 2 is a top plan view of a portion of one of the totalizers.

Figure 3 is a sectional side elevation of one of the totalizers,'and shows the parts as seen from the right-hand end, the section being taken immediately in front of the cents computing unit, as indicated by the dotted line 3-3 of Figure 6.

Figure 4 is'a side elevation, and shows the totalizer from its outside.

Figure 5 is a view similar to Figure 3, the section being taken on the line 5-5 of Figure 6 immediately `in front of the tent-hs of mills computing unit, and shows a carryover rack being released.

Figure 6 is a top plan view of the totalizer, some of the parts being broken away to show the underlying structure.

- Figure 7 is a diagrammatic side view showing the tenths of mills computing unit operated ive steps to carry over one digit to the mills computing unit.

Figure 8 is a diagrammatie-,view showing the mills computing unit operatedVA five steps to carry over one digit to the cents computing unit.

Figure 9 is a diagrammatievlew showing one of the computing units to the left of the mills computing unit operated ten steps to carry over `one digit to the unit o'f next higher order.

Figure 10 is a diagrammatic view of the mills computing unit, and shows the parts in their normal positions.

Only so much ofthe machine illustrated in the Von Reppert patent is shown herein as is necessary to arrive at a clear understanding of this invention. The machine comprises a register` or totalizer sectionfor casing 6 extending upwardly behind the typewriting machine (not shown). Saidcasing is provided withv a front plete 7 having a sightopening 500, through which may be observed dial-Wheels 18 of an item or multiplicand register 501, and a sight-opening 502, through which the dial-wheels 245of a product totalizer 503 may be observed.

The dial-wheels 18 of the item register are rotatable, to display the numbers thereon at the sight-opening,- b'y driving elements or racks operated by means controlled-bythe typewriter numeral-keys (not shown) while typing the multiplicand. These racks carry interponents which are settable, as the dialwheels are operated, relatively to the product plates. The product plates may he opthe dial-wheels 245, of the product totalizer 503, distances equal in value to the movements of the respective racks, the amount of movement of each rack being dependent upon the position of the associated interponents at that time relative to the product plates.

The dial-wheels 18 of the item register and the interponent-carrying racks are supported on a carriage 504, comprising side plates 4 and 5, to travel back and forth by means of rollers 12 on rails 13. The register `carriage is effective to move one space at a time, to the left, during the typing of the item or multiplicand, to display the multiplicand at the sight-opening 500. The register carriage is the moved, as explained in the Von Reppert patent, to position the dial-wheels 18 denominationally with reference to a decimal point 505 to locate the interponents denominationally relatively to the computing units of the product totalizer. The multiplier may now be typed.l While each digit of the multiplier is typed, the sum of the partial products appears iii the product totalizer, and the carriage of the item register moves one space at a time to the ri ht to lmove the interponents collectively antgl each into co-operative relation with the connection to the computing unit of next lower order. Finally, after the last digit of the multiplier is typed` the product appears at the sight-opening 502 of the product totalizer 503.

The machine may be provided with several product totalizers, only one being illustrated in the drawings. Each product totalizer comprises a series of denominatinally-arranged dial-wheels 245 to indicate cents,dimes and dollars. The dial-wheels 245 may be driven by the rack-bars or driving elements 152a through trains of gearing, each train comprisinor a computing wheel 231 to be rotated at the proper time by the associated rack-bar 152, said computing wheel driving an intermediate gear 248 meshing with a pinion 246 secured to the dial-wheel 245 to rotate the latter through the proper numberof steps. The computing wheels 231, intermediate gears 248 and dial-wheels 245 are mounted, respectively, on rods 231, 248a and 247, all of said rods being supported on walls 210 of a gfloating section of the totalizer. The oating section of the totalizer 'may be moved to and away from the rack-bars to move the computing wheels into or out of mesh with said bars. To guide the floating section of the totalizer in lthese movements, there are provided links 211 and arms 212 (Figures 3, 4 and 6), the arms 212 projecting from a rock-shaft 212 supported in walls 206 of a non-floating or relatively fixed portion of the totalizer.

The totalizers are normally disconnected from the driving racks or computing bars 15,23. When a computation is to be run into the totalizer, the ioating section is moved rearwardly to bring the computing wheels 231 into mesh with said computing bars before the latter are operated. To do this, one of the guide-arms 212 is provided with a rearwardly-extending arm 212", each totalizer being provided with one of these arms, and the various arms being operable by an upward movement of a common operating bar or plate 214, each arm engaging between two pins 213 and 215 on said bar. This movement brings the computing wheels 231 into engagement with the computing bars 152a, after which the computing bars may be operated to rotate the dial-wheels 245. After the computing bars 152a have been operated, the swinging section of the totalizer is released, thus ldisengaging the computing wheels from the famputing bars and allowing the latter to be .restored to their normal positions in a manner clearly described in the above-named Von Reppert patent.

Carry-over devices are provided between the computing units to carry one digit to the computing unit of next higher denominational order when a computing unit passes through zero. Each carry-over device com prises a carry-over wheel or disk 232 secured to the computing wheel 231 and on the side towards the one of next higherdenominational order. There are three cams or teeth 233y provided on each carry-over wheel, one at every tenth step thereof, the computing wheel 231 making one-third of a revolution to a complete revolution of the dial-wheel 245. Vhen a dial-wheel passes through zero, one of the carry-over teeth 233 engages a carryover pawl 234 to rock it about a fulcrum-rod 235, upon which all of the carry-over pawls are supported, to withdraw a stud 239, carried by an upwardly-extending arm 234x of said pawl, from beneath a. shoulder 240 of a Vcarry-over rack 237, from the Figure 3 po-l sition to the Figure 9 position. A spring 236, connected between lthe pawl and said rack, immediately becomes effective to pull the carry-over rack downwardly to the Figure' 9 position a distance equal in value to one digit, or, in other words, one step. The associated rack of each carry-over pawl is arranged so that it may engage'the computing wheel 231 of next higher order, and, as soon as the floating section of the totalizer is swung back to normal position to disengage the computing bars 152, the computing wheels 231 are brought into mesh with the carry-over racks 237.Y A universal bar 256 is operated to move all of the released carryover racks 237 back to their normal positions,

thus advancing the associated computing. wheels one step, which is transferred to the dial-wheels 245. Upon the return of the carry-over pawls, the studs 239 snap under the shoulders 240 to hold said racks in their normal positions. The carry-over racks are supported in the non-floating portion of the totalizer and are guided on rods or bars 238a and 238".

Each totalizer may occupy a neutral or ineffective position and may be moved to the right or left to connect it for computation or clearing. lVlicn the totalizer occupies a neu; tral position, its actuating arm 212K lies over a slot 506 in the stud 213 on the actuating bar 214 (Figure 3). Consequently, when the latter is operated, the arm 212x enters the slot 506, and, as a result, the totalizer remains disconnected from the computing bars.

To set the totalizer to multiply, there is provided a rock shaft 203, which may be operated in a clockwise direction in Figure 1, by means of a finger-piece 202, to set a pointer 209, secured to said shaft, opposite the sign Mult from the neutral sign N. The shaft 203 has secured thereto an eccentrically mounted stud 204` at its rear end (Figure 6), which projects into a slot 507 of a lateral extension or bar 205 on the right-hand cndplate 206 of the totalizer, so that, as the shaft is rotated in a clockwise direction, the totalizer is moved toward the rightto bring the computing gear-wheels 231 into effective relation with the computing rack-bars 152a (see Figure 2),. As the totalizer is moved rightwardly, the actuating arm is moved from above the slot 506A in the stud 213 of the actuating bar 214, so that, when the latter is operated, the swinging section of the totalizer is moved rearwardly to connect the computing wheels 231 with the computing bars 152.

lVhen it is desired to clear the-totalizer, or, if other words, bring the dial-wheels back to zero, it may be moved in the opposite direction b v rotating the finger-piece in a counterclockwise direction until the pointer is opposite the sign Clear (Figure 1). By this movement of the totalizer. the computing wheels are brought into effective relation With a set of rack-bars 152b (Figure 2) arranged alternately between the computing rack-bars 152". Each rack-bar 152" is geared to the computing rack-bar 152il of the associated computing unit to be actuated thereby an equal amount but in the opposite direction. After the totalizer hasbeen set toits clear position. a clear key not shown) may be operated, which causes the clear rack-bars 152", through the medium of the computing bars 152, to rotate the computing wheels 231 in counterclockwise directions. Each computing wheel is arrested at 0 by one of the teeth 233 which strikes against the flat face of the carry-over pawl 234, yielding` connections being used, as shown in the Von`Reppert patent, between the operating mechanism and the computing rack-bars, to allow the carry-over wheels to be arrested sooner or later without stopping the actuating mechanism.

The machine thus far described may be like that shown in the patent to Von Reppert, and is capable of computing as low as the cents position only. The present invention, however, providesmeans whereby computation may be performed below the cents position,

as, for example, in the mills and tenths of mills positions. F orthis purpose, there are provided computing units for the last two named positions.

In the present invention, a digit is automatically carried over to the cents computing unit when the mills computing unit is actuated through ive steps from normal position; in other words, if five mills are run in, one cent is carried over to the cents computing unit. If the mills computing unit is actuated ten steps subsequent to the first carryover, another cent is carried over. Thus, if the mills computing unit is moved fifteen steps from normal position, twocents are carried over to the cents computing unit. To this end, the mills computing wheel 231 normally occupies a position with the nearest tooth 233 of the carry-over wheel 232 five steps away from a tooth 600- on a carry-over pawl 601 associated with the mills computing unit. Consequently, the carry-over pawl 601 is operated by the tooth 233 when the mills computing wheel is operated through five steps, to release the carry-over rack .associated with the cents computing wheel 231, as shown in Figure 8, th cent being carried over when the rack 237 is restored to normal, in the manner previously described.

The mills computing wheel may `be restored to normal position by `reversely rotat ing it in a wayfsimilar to that described for the other computing Wheels when they are returned to 0, To arrest the mills comput ing wheel in its proper position, there is mounted a stop 602 on the carry-over pawl 601 five steps away from the carry-over tooth 600. Both the carry-over tooth 600 and the the stopping tooth 602 are pivotally mounted, so that said carry-over tooth and said stopping tooth may readily be brushed out of the way by the .teeth 233 of the carry-over wheel 232, against the tension of suitable springs 603 and 604 in order to pass by without operating \the pawl 601.v Thus, when the carry-over`wheel 232 is rotatediin an ineffective or counterclockwise direction (Figure 10), the tooth 600 is brushed aside about its pivot, when the carry-overwheel is rotated in a clockwise direction the stop tooth 602 is brushed aside thereby tabout its pivot in a counterclockwise direction.

The tenths of mills computing unit does not have a computing wheel as the other comsov lio

y computin puting units, but instead there is employed a computing `lever 605 pivoted on the rod 231 which supports the computing wheels 231. The lever 605 is connected to a. tenths of mills coiiiputin'g liar 606 by a link 607. Said computing bar may be like the bars 152 except that it is not provided with rack-teeth. 1t may be actuated in a Similar way by means including a link 608 (Figure 4). The coniputing lever i-eciprocates back and forth with the computing har 606 and carries a one-Way acting pawl 609, which, when the computing lever is swung in a clockwise direction, en gages one of the carry-over pawls 234 to release the carry-over rack 237 associated with the mills computing Wheel (Figure 7). The release of said rack is effected, however, only when the tenths of mills computing bar 606 is moved through five or more steps, the computin lever 605 moving idly when actuated less tan five steps, and returning with the bar after each actuation to normal position, as shown in Figure 5, where the pawl 609 is five steps away from the carry-over pawl. A contractile spring 610 is connected between the computing lever and the pawl 609 to hold the pawl against the shaft which arrests it in its normal or effective osition relativelyT to the computing lever. his spring allows the pawl 609 to pass the carry-over pawl 235 more readily on its return. The digit is finally carried over into the mills computing unit Von the return stroke of the carry-over racks, as hereinbefore described.

It is preferable to effect the carry-over fromthe tenths of mills computing unit to the mills computing unit at the fifth ste of the tenths .of mills computing bar 606. he carry-over may be effected, however, sooner or later by connectingA the link 607 at different positions on the `computinor bar 606, there being several holes 611 in sa1d bar for this purpose. In this way carry-over may be effectedat three, four, five, six or seven step vmovements of the computing bar, according to the connection of link 607 with the computing bar 606.

To further illustrate" the operation of the invention, let it be assumed that the following computation is to be performed:

562 lbs. 9% cents (.0925) per lb.

the product register. Finally, the product of 562 times .0925, which equals 51.985, is computed in the product totalizer.

As the computation progresses, the numbers show in the itein register and the product totalizer iii the following order:

Item Product register totalizer After item (562) is typed.. 5.62 00000.00 The itein-register-carriage is then automatically advanced two spaces as Athe ty writer carriage is tabu ated to the multi plicand position, and f the itern register then shows 562. 00 00000.00 The 0" o! the multiplicand is then typed and the item-register carriage steps down one step 56. 20 00000.00 Alter typing the 9"-... 5. 62 50. 58 1st partial product. +1. 124 zndpartial product. 5 Amountt on mills u compu ing unit Mw typmg the 2 when in normal position. 56 5l 709 281 3rd partial product. After typing the 5"..-.

. 5 51.99 Final product.

The mills computing unit is non-indicat ing; consequently, the values in the mills denominational position of the yproduct totalizer are represented in dotted lines in the above illustration.

It will be understood that at any time the tenths of mills computing unit of the product totalizer stands at 4, as in .934, and a half mill (.0005) is run into said tenths of mills computing unit, one cent is carried over to the cents computing unit; thus, in this illustration, the totalizer would indicate From the foregoing, it will be understood that all the computing units of the product totalizer, above and including the cents computing unit, are provided with dial-wheels and are therefore visible or indicating coniputing units. The mills and tenths of mills computing units are not provided with dialwheels, and are, therefore, non-indicating or blind computing units. It will further be understood that all of the computing units above and including the mills computing unit are accumulative, or, in other words, the numbers, as they are run in, are added to those already in said units, but the tenths of mills computing unit is a non-accumulative reciprocativel computin unit, since it is restored to normal position a ter each number is run in. Further it will be' understood that the register is provided with a sight-opening, that the computing units are arranged in regular denominational orderp from left to right, and that the result of the computation is displayed at the sight-,opening by the visible computing units only. Thus, there is provided a totalizer which is capable of computing to the fourth decimal lace 'and which indicates only to the secon decimal place or cents position, and whether the computation of a fractionof a cent is or is not -to effect a carry-over of a cent is determined automatically, in other words without attention of the operative.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

l. In acomputing machine, having a plurality of accumulating computing units arranged in denominational order, Iand carryover mechanism for each unit tq carry one digit at every tenth ste thereof to the computing unit of next hig er order, the combination of a-non-accumulating computing unit adjacent to and below the accumulating computin unit of lowest order, said non-accumulatmg computing unit comprising means to carry one digit to the accumulating com` puting unit of lowest order when the nonaccumulating computing unit is actuated through less than ten steps.

2. In a computing machine, having a pluralit of indicating computing units arranged in enominational order, and carry-over mechanism for each unit to carry one digit at every tenth ste thereof to the computing unit of next hig er order, the combination of two non-indicating computing units arran ed i in denominational order adjacent to and e- -low the indicating computing units, all the com-puting units except the one of lowest order being accumulative, the last-named unit comprising means operative when actuated through less than ten steps to eiect a carryover of one di it to the accumulative computing unit of owest order, andcarry-over mechanism to effect a carry over of one digit, when the accumulative unit of lowest order is actuated over a .definite number of steps less than ten, to the indicating computing lunit of lowest order. g

3. In a computing machine having a plurality of accumulative' computing units arranged in denominational order, and carryover mechanism for each unit t0 carry one digitV at every tenth position over to the computing unit of next higher order, the comination of a non-accumulative computing unit arranged adjacent to and below the accumulative computing units, the lnon-accumulative computing unitbeing effective when actuated through ivesteps'! from normal position to carry one digit to the accumulati've unit of lowest order, the carry-over mechanism associated with the accumulative unit of lowest order being effective, when the latter is moved through five steps from normal" position, to cause a carry over of one digit to the computing unit of next higher order and to carry over one digit for each subsequent movement of ten steps of said ac.- cumulative unit of lowest order.

steps less than ten, all of said units except the.

one of lowest order being accumulative', and the computing unit of second lowest order beinglelective to carry one digit to the unit of next igher order when moved a definite number of steps less than ten from its normal position, said unitof second lowest orderv being also effective to vsubsequently carry over a digit at every tenth step.

5. In a computing machine, the combination of a first computin unit and a second computing' unit arrange respectively, in ascending denominational order, said units including individual actuating elements operable over predetermined variable distances, devices operable b said actuating elements, the device of the rst unit returnlng to normal after each operationrof the associated ac.- tuating element, thev device of the second unit being accumulative andv remaining in position after each l operation by the associated actuating element, and means operable by the device of the. first unit when said device is actuated beyond a definite number of steps to cause the device of the second unit to be advanced one step independently of its associated actuating element.

6. In a computitng machine, the combination of a first conlpu'tin` unit and a second computing unit arrangerespectively, in ascending denominational order, s aid units Aincluding individual actuating elements oper- Y able over predetermined .variable distances,

the first computingv unitl including a lever' operable by the associated actuating element, said lever returning to normal after each operation of the `associated actuating element, the second unit including a computing wheel, said wheel remaining inpositionafter each operation by the associated actuating element, and means operable by the computing lever when it is actuated beyond five steps to cause the computing wheel to be advanced one step independently of its associated actuating element. l 7. In aV computing machine, the combination of an accumulating computing unit, a

non-accumulating computing unit, said units being arranged, respectively, in descendingv denominational order, the no -accumulating unit being completely restored 'o normal position after each operation, and means'actuated by the non-accumulating computing unit when operated a definite number ofvsteps less than ten to cause one digit to be carried to the other computing unit.

8. lfnuacomputing machine, the combination of a mills computing unit, a tenths of mills computing unit, actuating elements for said units, the tenths of niilyl's unit being connected to be completely restored to normal position after eachl actuation, and means actuable by the tenths of mills computing unit when it is operated a definite number of steps less than ten to cause one digit to be carried to the mills computing unit.'

9. In a computing machine, the combination` of a tenths of mills computing unit, a mills computing unit, said units being arrangedin denominational order, actuating elements for 'said units, the tenths of mills unit being completely restored to normal position after each actuation, means actuated by the tent-hs of mills computing unit 'when operated five steps to cause one digit to be carried over to the mills computing unit, a cents computing unit, and means actuable by the mills computing unit when the latter is operated tive steps to cause one digit to be carried to the cents computing unit, said lastnamed means being operable at every7 tenth step, after the first carry over is effected, to carry one digit to the cents computing unit.

10. In a. computing machine, the combination olf accumulating computing units, anonaccumulating computing unit, carry-over devices, means to actuate said computing units, said means including la bar associated with the non-accumulating computing unit, Vone of the carry-over devices being associated with ythe non-accumulating computing unit,

Vand adjustable. means associated with the non-accumulating computing unit to eiect a carry-over at a `predetermined number of steps less thanv ten of the non-accumulating computing unit;

11. In a computingmachine, the combination of accumulating computingunits, a reciprocating computing unit, carry-over devices, means to actuate said computing units, said means including abar associated -with the reciprocating computing unit, one of the carry-.over devices being associated Vwith -the reciprocatin computing unit, adjustable means associated with the reciprocating computing unit to effect a carry-'over at a predetermined number of steps less than tenof the' reciprocating computing unit, said adjustable means including a ink, and meansfor variabl connecting said link with said computin ai'. c

12. n a computing machine, the combination of a register including a computing unit, a carry-over device, and means between said com uting unit and said carry-over device'to ren er the latter effective when the computi ing unit is moved a predetermined distance in one direction and operable to enable the computing unit to be restored without ren- Y` having aA pair of pawls, and

dering the carry-over device eective, when actuated a fraction of the predetermined disputing rack of carry-over mechanism for the' mills-Wheel to carry a fractional value as one i 4cent to the-centregistering wheel, and a tenths of mills computing device including a reciprocating trip-carrying computing lever operable by a reciprocatable computing bar and conditioned to effect a carry-over movev ment of predetermined extent to the mills computing Wheel.

14. In a computing machine having reciprocata-ble computing racks and accumulating register-wheels actuated thereby for computing in dollars and cents, and carry-over mechanism for the register-wheels, the combination with a non-registering mills computing wheel operable by a'. reciprocatable computing rack, of carry-over mechanism therefor to carry a fractional value as onecent to the cent-registering wheel, a tenths of mills computin device including a reciprocating trip-carrying lever operable to trip and condition the carry-over mechanism `to the mills computing wheel, a reciprocatablel'tenths of mills computin bar, and a link adjustably connecting sai computing bar with the tenths' of'mills computing-device andoper-` able to redetermine the normalpositioniof the .mil s computing device and detei'n'iine the extent of the 'carrying movement. n

15. In a computing machine having reciprocatable computing racks and accumulating register-wheels actuated thereby for co'mputv ment of five mills to the cent-wheel, and a nonregistering tenths of mills computing device .operable by a reciprocatable computing bar and conditioned to effect a carry-over movementto. the-mills-Wheel of less than ten steps, from a` predetermined normal position.

16. -In a computing machine having reciprocatable computing racks and accumulating register-wheels actuated thereby for computing in dollars and cents, and carry-over mechanism foreach register-wheel, the com-V bination with a.' mills mputing wheel o erable by a reci rocatablerack-bar, of mi carry-over mecanism including a carrier means carried by lao the mills-wheel and rotatable in one direction to engage one pawl for a normal or zero setting position for said Wheel, and rotatable in the opposite direction to trip the other pawl andel'ect a carry-over movement to the next higher Wheel of predetermined carry-over extent.

17. In a computing machine having reciprocatable computing racks andaccumulating register-Wheels actuated thereby for computing in dollars and cents, and carry-over mechnism for each register-Wheel, the combination with a mills computing wheel operable by a reciprocatable rack-bar, of a mills carry-over mechanism including a carrier having a pair of pawls, and -a plurality of carrying teeth rotatable with the mills com puting Wheel in either direction, each tooth operable to engage with one pawl on the carf rier for a normal or zero setting position carry-over movements to the cents-wheel 25 when actuatedfor not less than five mills.

HENRY L. PITMAN. 

